Brezzi, F. On the existence, uniqueness and approximation of saddle-point problems arising from Lagrangian multipliers. (English) Zbl 0338.90047 Rev. Franc. Automat. Inform. Rech. Operat. 8, Analyse numer., R-2, 129-151 (1974). MSC: 90C30 49K35 PDFBibTeX XMLCite \textit{F. Brezzi}, Rev. Franc. Automat. Inform. Rech. Operat., R 8, No. 2, 129--151 (1974; Zbl 0338.90047) Full Text: EuDML
Fraeijs de Veubeke, B. Variational principles and the patch test. (English) Zbl 0284.73043 Int. J. Numer. Methods Eng. 8, 783-801 (1974). MSC: 74S05 PDFBibTeX XMLCite \textit{B. Fraeijs de Veubeke}, Int. J. Numer. Methods Eng. 8, 783--801 (1974; Zbl 0284.73043) Full Text: DOI
Brønlund, O. E.; Johnsen, Th. Lunde QR-factorization of partitioned matrices. Solution of large systems of linear equations with non-definite coefficient matrices. (English) Zbl 0278.65041 Computer Methods appl. Mech. Engin. 3, 153-172 (1974). MSC: 65F25 65F05 65F10 PDFBibTeX XMLCite \textit{O. E. Brønlund} and \textit{Th. L. Johnsen}, Comput. Methods Appl. Mech. Eng. 3, 153--172 (1974; Zbl 0278.65041) Full Text: DOI